Band-saw-filing machine.



R. WILLIAMS III C. S. BUSHELL.

BAND SAW FILING MACHINE.

APPLICATION FILED JUNE 1. I915.

1,1 86,357 Patented June 6, 1916.

3SHEETS-SHEIET I.

Qttoimgo R. WILLIAMS & C. S. BUSHEI L. BAND SAW FILING MACHINE.

APPLICATION EILED was a. 1915.

Patented June 6,- 1916.

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R. WILLIAMS & c. s. BUSHELL.

BAND SAW FILING MACHINE.

APPLICATIOM EILED JUNE I, 1915.

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RALPH WILLIAMS AND CHARLES S. BUSHELL, 0F BELOIT, WISCONSIN.

BAND-SAW-FILING MACHINE.

Application filed .Tune 1, 1915.

To all whom it may concern: I

Be it known that we, RALPH WILLIAMS and CHARLES S. BUsHELL, citizens of the United States, residing at Beloit, in the county of Rock and State of Wisconsin, have invented certain new and useful Improvements in Band-Saw-Filing Machines; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to improvements in saw filing machines, and more particularly to those designed for filing band saws without removing the same from the machine.

The object of the invention is to improve upon the general construction of device of this class to the extent hereinafter described and pointed out in the claims.

' In describing the invention, we shall refer to the accompanying drawings wherein like reference characters designate corresponding parts throughout the various views, and wherein:

' Figure 1 is a front elevation of a saw filing machine constructed in accordance with our invention. Fig. 2 is a top plan view thereof. Fig. 3 is a rear side elevation. Fig. 4 and Fig. 5 are horizontal sectional views as seen respectively along the planes indicated by the lines 44 and 5-5 of Fig. 1. Fig. 6 is a detail vertical longitudinal section taken on the line 66 of Fig. 5. Figs. 7, 8 and 9 are vertical transverse sections taken respectively on the lines 7-7, 8-8 and 99 of Fig. 1. Fig. 10 is a perspective view of the sectional reciprocatory file operating rod. Fig. 11 is a detail horizontal section showing more particularly the construction of one of the filing clamps.

In these drawings, constituting a part of the application, 1 designates a T-shaped base having a shank 2 which is provided with a longitudinal slot 3 for the reception of a clamp (not shown), whereby the base may be secured to the table of a band saw. The head 4 of the T-shaped base 1 is here shown as provided with an upright centering screw 5 which is alined with the slot 3 and which is adapted to be projected into the slot of the aforesaid table to correctly position the base in respect to the saw S, after the clamp has been disposed in the slot of the table and the aforesaid slot 3.

Specification of Letters Patent.

Patented June 6, 1916.

Serial No. 31,528.

Rising from the edge of the head 4 remote from the shank 2, is an upright laterally movable supporting member here shown in the form of a fiatmetal plate 6 having a pair of notches in its lower edge whereby to provide 'a number of upright legs 7, the lower ends of the latter being hinged at 8 to the head 4 of the base 1, whereby the plate or member 6 may be rocked laterally toward and away from the saw S. To accomplish this adjustment of the member 6, the central leg thereof is provided with an ear 9 which justment of the screw 10 will rock the supporting member 6 toward or away from the saw as the case may be, thus allowing a very accurate adjustment to be made when the base has been securely clamped-in position upon the saw table.

In the present embodiment of the invention, the upper edge portion of the plate 6, is shown as provided with a pair of alined bearings 12 which constitute a guideway in which a reciprocatory rod 13 is slidably supported, this rod being here shown as constructed of a main section 13 and a supplemental section 13 hinged to one end thereof to swing laterally. Such movement is imparted to the section 13", by practically any preferred type of cam 14, this cam being here shown in the form of a plate having a groove 14 in its upper side extending substantially throughout its lengtlnand an additional groove 14 lying parallel to approximately half of said groove 14 and communicating therewith at oneend as seen at 14, communication between the groove 14 and the other end of the groove 14", however, being prevented by a flat leaf springer tongue 14 which spans this end of the groove 14", all of these details being most clearly disclosed in Fig. 5. Depending from the section 13 of the bar 13, is a pin 15, which, when said bar is being shifted in one direction upon the working stroke of the file, travels throughout the length of the groove 14 thus holding the two sections 13 and 13 in alinement' and retaining the file in contact with the saw. Upon the end of this working stroke, however, the pin travels around 1& into the groove 14!, thus moving the movable section 13 laterally to the dotted line position shown in Fig. d to thereby dispose the file out of contact with the saw. Upon the return stroke of the bar 13 and the file, the pin 15 travels within the groove 1%" until it comes into contact with the spring 14: whereupon this spring yields and allows the pin to again enter the groove 11, thus again forcing the file into contact with the saw in position for the next working stroke of said file. Upon such return stroke of the file and parts actuating the same, the saw S is shifted upwardly a distance equal to the length of one tooth, thus disposing an nnfiled tooth to be acted. upon by the file upon its next working stroke. This shifting of the saw is accom plished by an intermittent feed mechanism to be hereinafter described.

Although the bar 16 might well be con nected to the rod 18 by practically any preferred means, the opposite ends of this rod are preferably provided with upright posts 18, to the upper ends of which the opposite ends of said bar are pivoted as seen at 19. Furthermore, although any preferred means could be employed for securing the file 17 in operative relation to the bar 16, a pair of spaced nuts 20 having clamping screws 21 threaded inwardly therethrough, is preferably provided, these nuts having clamping yokes 20 slidable longitudinally upon the bar 16 and releasably secured in position by set screws 22 or the equivalent there of. In the present embodiment of the invention, the inner facing ends of the set screws 21 are shown as provided with sockets s3 which receive the opposite ends of the file 17 and thus securely clamp the same in position. The socket of one screw is of triangular formation, if the file be of such shape, and this screw is provided with any preferred means for releasably locking it against rotation, this means being here shown in the form of a set screw 2st.

From the preceding description, it will be evident that as the rod 1; is reciprocated and its movable section 13" is shifted laterally upon each stroke, one end of the bar 16 is likewise shifted laterally, thus moving the file away from the saw on its return stroke, and projecting said file against the saw on its working stroke.

It often becomes expedient to shorten or lengthen the working stroke of the file 17 according to the character of the work being done, and since means to be described is provided for varying the stroke of the rod 13, it becomes highly essential to so mount the cam 1% as to allow it to be adjusted longitudinally of said rod, thus allowing the pointat which the file is retracted from the saw to be readily under control of the operator. Numerous details of construction may be provided for acconrplishing this result, but as typical of one very eliicient style of construction for so doing, we have shown the cam let resting upon a cam carrying plate 25 which projects laterally from the plate 6, said cam being adjustably secured to the two plates (3 and by two or more screws 26. It will thus be evident that by removing these screws the cam may be shifted longitudinally, thus allowing the desirable results above mentioned to be attained.

For the purpose of reciprocating the rod 13 and the parts carried thereby, an upright lever 30 is fulcrumed at its lower end to the base as seen at 31, while its upper end is provided with a slot receiving a pin 32 which projects laterally from said rod, the lower end portion of the lever 30 being provided with an upright series of openings 33 through one of which a screw 3e is removably passed, this screw being likewise passed through one end of a pitman 35, which end may therefore be adjusted vertically by removing the screw and inserting it through another opening 33. The other end of the pitman is pivotally connected to the crank 36 of the crank shaft 37, the latter being rotatably mounted in bearings carried by the upper ends of posts 38 which rise from one end of the head 4: of the base 1. Although any preferred means may be provided for rotating the shaft 37, a pulley 39 is shown as secured thereto, whereby a driven belt may be ap plied for driving said shaft, thereby reciprocating the pitinan 35 and oscillating the lever 30, the latter now imparting reciproeatory movement to the rod 13 and the parts carried thereby. It is to be observed that due to the fact that the pitman 35 is con nected to the lever 30 near the lower end thereof, only a very small amount of movement need be imparted to said pitman in order to shift the rod 13 the necessary amount, this being of course due to the fact that the upper end of said lever 30 moves a greater distance than the portion thereof near its fulcrum.

In addition to the parts above described, the rear side of the plate 6 is provided with an upright flange d0 which abuts one fiat side of the saw S when the machine is applied to use. Immediately to one side of the flange &O, the plate 6 is slotted as seen at s1, and an oscillatory arm as which is pivoted to ears 48 on the front side of the plate 6, is projected rearwardly through said slot. lhe rear projecting end of the oscillatory arm 12 is provided with a pivot-- ally mounted dog as which engages the teeth of the saw S and lifts the same upwardly, after the arm -12 is raised by most any preferred means. In the present case, however, a vertically adjustable horizontal lever 45 and a cam 46 for rocking the same, is shown for the purpose of raising the arm 42 at the proper time. As clearly shown in Fig. 5, one end of the lever is underlies the arm 42, while the other end thereof is disposed beneath the cam 46 which is carried by one end of the crank shaft 37. The disposition of parts is such as to move the arm 42 and dog 44; upwardly when the file 17 is being returned to the point at which it starts its working stroke, during which movement said file is spaced from the saw, it being therefore evident that the latter is moved upwardly a distance equal to the length of one tooth, on the inactive stroke of the file, and that it is therefore in position for the file to engage a new tooth, upon its next working stroke.

If the saw teeth be fine, it would of course be undesirable to allow the dog 44 to have an amount of movement greater than the length of the teeth, since were such the fact the saw would be shifted too far upon each stroke of the file. It therefore becomes highly desirable to provide simple and efficient means for limiting the downward movement of the arm 42 and dog 44:, thus preventing the undesirable results from being obtained. For accomplishing this end, although practically any type of stop means could be provided, the set screw 47 is preferably provided, the latter being threaded upwardly through a web which connects the lower edges of the cars 43 as shown clearly in Fig. 8.

From the foregoing description, taken in connection with the accompanying drawings, it will be evident that although comparatively simple construction has been provided for carrying out the objects of the invention, the machine will be very efficient in operation and will possess a number of advantageous features.

In the drawings, we have shown a number of specific details for accomplishing probably the best results, and in the foregoing, have described such details, but we need not, be limited thereto otherwise than as set forth in the appended claims, it be ing evident that numerous minor changes in shape, size, etc., may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention as claimed.

lVe claim 1. A saw filing machine comprising a base, a laterally shiftable member rising therefrom, the base being constructed to dis pose the toothed edge of a saw in front of said member, a saw filing mechanism carried by said member, and manually operable adjusting means for regulating the position of said member to move the saw filing mechanism toward or away from the toothed edge of the saw.

2. A saw filing machine comprising a longitudinally reciprocated laterally shiftable member, saw filing means carried thereby, a cam controlling the lateral shifting of said member and shiftable longitudinally thereof, and means for normally holding said cam against movement.

3. A saw filing machine comprising a guideway and a cam attaching plate adjacent the same, a longitudinally reciprocated member mounted in the guideway and including a laterally shiftableelement having saw filing means thereon, and a cam secured to the cam attaching plate for controlling the shifting of the aforesaid element and adjustable longitudinally of said element.

4. A saw filing machine comprising a base, a supporting member rising therefrom, a reciprocated carriage member mounted on the aforesaid member above the base, saw filing means carried by the carriage member, an upright lever fulcrumed at its lower end and having a sliding connection with the carriage member at its upper end, a pitman pivoted to said lever near the lower end thereof, and means reciprocating said pitman.

5. A saw filing machine comprising a base, a supporting member rising therefrom, a reciprocatory carriage member mounted on the aforesaid member above the base, saw filing means carried by thecarriage member, an upright lever fulcrumed at its lower end and having a sliding connection with the carriage member at its upper end, a pitman pivoted to said lever near the lower end thereof and adjustable vertically thereon, and means reciprocating said pitman.

6. The combination with a reciprocatory laterally shiftable member, means for reciprocating said member including means whereby the length of the reciprocation may be varied, and saw filing means carried by said member, of a cam controlling the lateral shifting of the latter and adjustable longitudinally thereof.

7. A saw filing machine comprising a supporting member, a guideway carried thereby, a reciprocatory rod slidable in said guideway and formed of a pair of hingedly connected sections, means shifting one of said sections laterally as the rod reciprocates, a file carrying member having a pivotal connection with each of and a file carried by said member.

said sections,

8. A saw filing machine comprising a supporting member, a guideway carried thereby, a reciprocatory rod slidable in said guideway and formed of a pair of hingedly connected sections, means shifting one of said sections laterally as the rod reciprocates, a file carrying bar disposed substantially parallel to the rod and having its two ends pivotally connected with the two sections thereof respectively, and a file carried by said bar.

9. A saw filing machine including a cam a plate having in one of its sides a co1nparatively long groove and a shorter groove lying parallel to a portion of the aforesaid grooves, the two grooves being in communication at one end, the other end of the shorter groove 10 being curved laterally to the longer groove, a spring tongue normally closing the later-- ally curved end of the shorter groove, :1 pin RALPH \VILLIAMS. CHARLES S. BUSHELL.

Witnesses EMnnsoN G. PEET, J. DANA Pnn'r.

flames or this patent may be obtained for five cents each, by addressing the Commissioner or Patent-s. Weehington, I). 0. 

